#!/usr/bin/env python3
# Copyright (c) 2016-2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test RPC commands for signing messages with private key."""

import base64

from test_framework.descriptors import (
    descsum_create,
)
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
    assert_equal,
    assert_raises_rpc_error,
)


class SignMessagesWithPrivTest(BitcoinTestFramework):
    def set_test_params(self):
        self.setup_clean_chain = True
        self.num_nodes = 1

    def addresses_from_privkey(self, priv_key):
        '''Return addresses for a given WIF private key in legacy (P2PKH),
           nested segwit (P2SH-P2WPKH) and native segwit (P2WPKH) formats.'''
        descriptors = f'pkh({priv_key})', f'sh(wpkh({priv_key}))', f'wpkh({priv_key})', f'wsh(pk({priv_key}))', f'tr({priv_key})'
        return [self.nodes[0].deriveaddresses(descsum_create(desc))[0] for desc in descriptors]

    def run_test(self):
        message = 'This is just a test message'

        self.log.info('test signing with priv_key')
        priv_key = 'cUeKHd5orzT3mz8P9pxyREHfsWtVfgsfDjiZZBcjUBAaGk1BTj7N'
        expected_signature = 'INbVnW4e6PeRmsv2Qgu8NuopvrVjkcxob+sX8OcZG0SALhWybUjzMLPdAsXI46YZGb0KQTRii+wWIQzRpG/U+S0='
        signature = self.nodes[0].signmessagewithprivkey(priv_key, message)
        assert_equal(expected_signature, signature)

        self.log.info('test that verifying with P2PKH address succeeds')
        addresses = self.addresses_from_privkey(priv_key)
        assert_equal(addresses[0], 'mpLQjfK79b7CCV4VMJWEWAj5Mpx8Up5zxB')
        assert self.nodes[0].verifymessage(addresses[0], signature, message)

        self.log.info('test that verifying with non-P2PKH addresses succeeds')
        bin_sig = bytearray(base64.b64decode(signature))
        for non_p2pkh_address in addresses[1:3]:
            assert self.nodes[0].verifymessage(non_p2pkh_address, signature, message)
            bin_sig[0] += 4
            bip137_signature = base64.b64encode(bin_sig).decode('ascii')
            assert self.nodes[0].verifymessage(non_p2pkh_address, bip137_signature, message)

        self.log.info('test that verifying with p2wsh address throws error')
        assert_raises_rpc_error(-3, "Address does not refer to key", self.nodes[0].verifymessage, addresses[3], signature, message)

        self.log.info('test that verifying with p2tr address throws error')
        assert_raises_rpc_error(-3, "Address does not refer to key", self.nodes[0].verifymessage, addresses[4], signature, message)

        self.log.info('test that verifying Electrum p2sh-segwit succeeds')
        signature = 'IFBRc4WU3K2c75KG7kcn/x9Ov6y75xrk05t9Zi7kwEIJNU0dMFMgRdeeKYo8JC4L83ckPavuaI+GUuvYZdwkGsM='
        assert self.nodes[0].verifymessage('2MzoTgQ7YuReUaXaW2iciHoewDGdmagMVuy', signature, message)

        self.log.info('test that verifying Electrum p2wpkh succeeds')
        signature = 'IBR+8bubsBxBFFE3CO6pggzNSRyg/23HRMNXyWUIIEXmTe3P0apzd5izyR/d80nVRE883I58gijFKIevBLtcPRI='
        assert self.nodes[0].verifymessage('bcrt1qa0mscp9epevt07rscyjsre5fdlxjp3tlcchs4x', signature, message)

        self.log.info('test that verifying Sparrow p2wpkh ("Electrum") succeeds')
        signature = 'H036ky29d5FwS0K46di8ssfP+UbVEghDoexR2GGv+WX+WQHVnTWiUTOSjazS3+aIx92qsnE0m/WK2uflxI47BhQ='
        assert self.nodes[0].verifymessage('bcrt1q00cc7f4m04f5mjdcm9g6c5y2a3wnvfvflljety', signature, message)

        self.log.info('test that verifying Sparrow p2wpkh ("BIP137/Trezor") succeeds')
        signature = 'J036ky29d5FwS0K46di8ssfP+UbVEghDoexR2GGv+WX+WQHVnTWiUTOSjazS3+aIx92qsnE0m/WK2uflxI47BhQ='
        assert self.nodes[0].verifymessage('bcrt1q00cc7f4m04f5mjdcm9g6c5y2a3wnvfvflljety', signature, message)

        self.log.info('test that verifying Sparrow p2wpkh ("BIP322 Simple") succeeds')
        signature = 'AkcwRAIgCu7IrN3jCvBdp5myPZHCKiOW5o3EToYG2xgPbjiw6JsCIFwaZMcYQj9FmWcNtZk3qTp2UDBm77cbFmxQ3WVnVxrCASEDonFDI6fuQ05yUfeQIsOs599XHZnpaTxaqD13g4sXYRY='
        assert self.nodes[0].verifymessage('bcrt1q00cc7f4m04f5mjdcm9g6c5y2a3wnvfvflljety', signature, message)

        self.log.info('test that verifying Sparrow p2tr ("BIP322 Simple") succeeds')
        signature = 'AUFdYU3dZCSmTxWnl5ja/Jo096VAaKtdaYs8b4ikF2iuQ2fiy7YSFHBWcD40a1oBKTVWUrXqOC0pXoDjTFKqM/ObAQ=='
        assert self.nodes[0].verifymessage('bcrt1p5t6gmtfkd4q8jfgz40auxqgtll895n85amlgvgsz0jwxvfw9qltss6wfve', signature, message)

        self.log.info('test parameter validity and error codes')
        # signmessagewithprivkey has two required parameters
        for num_params in [0, 1, 3, 4, 5]:
            param_list = ["dummy"]*num_params
            assert_raises_rpc_error(-1, "signmessagewithprivkey", self.nodes[0].signmessagewithprivkey, *param_list)
        # verifymessage has three required parameters
        for num_params in [0, 1, 2, 4, 5]:
            param_list = ["dummy"]*num_params
            assert_raises_rpc_error(-1, "verifymessage", self.nodes[0].verifymessage, *param_list)
        # invalid key or address provided
        assert_raises_rpc_error(-5, "Invalid private key", self.nodes[0].signmessagewithprivkey, "invalid_key", message)
        assert_raises_rpc_error(-5, "Invalid address", self.nodes[0].verifymessage, "invalid_addr", signature, message)
        # malformed signature provided
        assert_raises_rpc_error(-3, "Malformed base64 encoding", self.nodes[0].verifymessage, 'mpLQjfK79b7CCV4VMJWEWAj5Mpx8Up5zxB', "invalid_sig", message)


if __name__ == '__main__':
    SignMessagesWithPrivTest(__file__).main()